After carrying out MOTs for years, these are some of the biggest things I've learned that every used car buyer should know.
What An MOT Actually Is
Having carried out MOTs for years, one thing I've learned is that a lot of people don't fully understand what an MOT actually is.
An MOT is a roadworthiness inspection carried out on the day the vehicle is tested. It checks that certain safety and environmental standards are met at that moment in time.
A pass certificate simply means the vehicle met the legal minimum standards on the day it was inspected. It isn't a guarantee that the car won't need repairs next week or next month.
"An MOT tells you whether a car was roadworthy on the day it was tested. It doesn't tell you whether it's a good car to buy."
What An MOT Doesn't Tell You
One of the biggest misconceptions I see is people thinking a fresh MOT means the car is mechanically perfect.
An MOT doesn't tell you whether the engine is healthy, whether the gearbox is going to last another 50,000 miles, whether the clutch is worn out or whether a large repair bill is just around the corner.
That's why I always tell people not to rely on the MOT certificate alone when buying a used car.
What I Look For In MOT History
When I'm looking at a used car, I pay far more attention to the MOT history than simply whether it currently has a pass certificate.
I'm looking for patterns rather than individual failures.
- Has it had corrosion advisories every year?
- Has it repeatedly needed tyres?
- Have brake advisories been ignored?
- Has the mileage increased consistently?
- Are the same problems appearing year after year?
- Does the MOT history match what the seller is telling me?
One thing I'd always recommend when buying a used car is spending a few minutes checking the MOT history online. It's completely free, takes a couple of minutes and can sometimes reveal issues that the seller hasn't mentioned.
Don't Panic About MOT Failures
Another thing I've learned over the years is not to panic if a vehicle has failed an MOT in the past.
Every vehicle needs maintenance at some point. What matters is why it failed and whether the repairs were carried out properly.
For example, a car failing because it needed tyres or brake pads wouldn't concern me if those items were replaced afterwards. What would concern me is seeing the same corrosion or oil leak advisories appearing year after year without being dealt with.
My Honest Opinion
A fresh MOT should always be seen as a good starting point, not a guarantee.
The best cars I've seen over the years are usually the ones with a strong service history, sensible owners and clear evidence they've been maintained properly throughout their life.
Whenever you're buying a used car, look at the full picture. Check the MOT history, read through the service history, ask questions and road test the vehicle properly. That's how you give yourself the best chance of buying a good car.
"If you only remember one thing from this article, remember this: a pass certificate doesn't tell you how good the car is — the history behind it does."
If you're unsure how to interpret an MOT history or want an experienced mechanic to review a vehicle before you buy it, our Expert Vehicle Review checks the MOT history, identifies recurring issues and helps you spot warning signs that many buyers miss.
Alfie has over 11 years of experience in the motor trade and founded Alfa Prestige to give buyers the insider knowledge that was previously only available to professionals.
